My wife and I were staying at GVR for a vacation and decided to try Tides since it was conveniently located just off the Casino.
We tried several different dishes while we were there, such as the Peel-And-Eat Cajun Shrimp, Fish & Chips as well as the Shrimp Po' Boy and all were very, very good. I wouldn't say this is over-the-top five star dining, but it's a good quality meal in a nice open atmosphere.
They had a deal going while we were out there, where you could get a pound of the Peel-And-Eat Shrimp with a pint of beer for $17. Not an amazing bargain, but cheap enough to make a sub-$30 meal out of it with another main dish.
I mark it down for service. When we went there it was relatively empty yet we still had to constantly get our waiters attention if we needed refills on our drinks or to order our next course. I'm sure this isn't the norm, but it was a little ridiculous.
My wife and I were pleased and if you're in the mood for good seafood while at GVR (and about done with their great buffet), Tides is a good spot to check out.